EUROPEAN ETS TELECOMMUNICATION October 1991 STANDARD

Transcription

1 EUROPEAN ETS TELECOMMUNICATION October 1991 STANDARD Source: ETSI TC-SPS Reference: T/S ICS: Key words: ISDN, supplementary service Integrated Services Digital Network (ISDN); Multiple Subscriber Number (MSN) supplementary service Functional capabilities and information flows ETSI European Telecommunications Standards Institute ETSI Secretariat New presentation - see History box Postal address: F Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.fr Tel.: Fax: Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute All rights reserved.

2 Page 2 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to "ETSI Editing and Committee Support Dept." at the address shown on the title page.

3 Page 3 Contents Foreword Scope Normative references Definitions Symbols and abbreviations Description Derivation of the functional model Functional model description Description of the functional entities Relationship with a basic service Information flows Information flow diagrams Definition of individual information flows SDL diagrams for functional entities FE FE Functional Entity Actions (FEAs) FEAs of FE FEAs of FE Allocation of functional entities to physical locations History... 20

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5 Page 5 Foreword This European Telecommunication Standard (ETS) has been produced by the Signalling Protocols & Switching (SPS) Technical Committee of the European Telecommunications Standards Institute (ETSI). In accordance with CCITT Recommendation I.130 [1], the following three level structure is used to describe the supplementary telecommunications services as provided by European public telecommunications operators under the Pan-European Integrated Services Digital Network (ISDN): - Stage 1: is an overall service description, from the user's standpoint; - Stage 2: identifies the functional capabilities and information flows needed to support the service described in stage 1; and - Stage 3: defines the signalling system protocols and switching functions needed to implement the service described in stage 1. This ETS details the stage 2 aspects (functional capabilities and information flows) needed to support the Multiple Subscriber Number (MSN) supplementary service. The stage 1 and stage 3 aspects are detailed in ETS (1991) and ETS (1991), respectively.

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7 Page 7 1 Scope This standard defines the stage two of the Multiple Subscriber Number (MSN) supplementary service for the pan-european Integrated Services Digital Network (ISDN) as provided by European public telecommunications operators. Stage two identifies the functional capabilities and the information flows needed to support the stage 1 service description. The stage two description also identifies user operations not directly associated with a call (see CCITT Recommendation I.130 [1]). This standard is specified according to the methodology specified in CCITT Recommendation Q.65 [2]. This standard does not formally describe the relationship between this supplementary service and the basic call, but where possible this information is included for guidance. In addition this standard does not specify the requirements where the service is provided to the user via a private ISDN. This standard does not specify the requirements for the allocation of defined functional entities within a private ISDN; it does, however, define which functional entities may be allocated to a private ISDN. This standard does not specify the additional requirements where the service is provided to the user via a telecommunications network that is not an ISDN. The MSN supplementary service provides the possibility for assigning multiple numbers to a single public or private access. NOTE: This allows e.g.: It is considered: 1) a calling user to select, via the public network, one or multiple distinct terminals out of a multiple choice, 2) to identify the terminal to the network for the application of other supplementary services. - that in the case of a basic access some service providers may not have knowledge or control over what is connected, e.g. a private ISDN or a terminal configuration, - that service providers have differing numbering methods. The MSN supplementary service is applicable to all telecommunication services. This standard is applicable to the stage three standards for the ISDN MSN supplementary service. The term "stage three" is also defined in CCITT Recommendation I.130 [1]. Where the text indicates the status of a requirement (i.e. as strict command or prohibition, as authorisation leaving freedom, as a capability or possibility) this shall be reflected in the text of the relevant stage three standards. Furthermore, conformance to this standard is met by conforming to the stage three standards with the field of application appropriate to the equipment being implemented. Therefore no method of testing is provided for this standard.

8 Page 8 2 Normative references This ETS incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to, or revisions of any of these publications apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. [1] CCITT Recommendation I.130 (1988): "Method for the characterisation of telecommunication services supported by an ISDN and network capabilities of an ISDN". [2] CCITT Recommendation Q.65 (1988): "Stage 2 of the method for the characterisation of services supported by an ISDN". [3] CCITT Recommendation I.112 (1988): "Vocabulary of terms for ISDNs". [4] CCITT Recommendation E.164 (1988): "Numbering plan for the ISDN era". [5] CCITT Recommendation Q.71 (1988): "ISDN 64 kbit/s circuit mode switched bearer services". [6] CCITT Recommendation I.210 (1988): "Principles of telecommunication services supported by an ISDN and the means used to describe them". [7] CCITT Recommendation Z.100 (1988): "Functional Specification and Description Language (SDL)". 3 Definitions For the purposes of this standard, the following definitions apply: Integrated Services Digital Network (ISDN): see CCITT Recommendation I.112 [3], 2.3, definition 308. Service; telecommunications service: see CCITT Recommendation I.112 [3], 2.2, definition 201. Supplementary service: see CCITT Recommendation I.210 [6], 2.4. ISDN number: a number conforming to the numbering plan and structure specified in CCITT Recommendation E.164 [4]. 4 Symbols and abbreviations FEA ISDN LE MSN SDL TE Functional Entity Action Integrated Services Digital Network Local Exchange Multiple Subscriber Number Specification and Description Language Terminal Equipment

9 Page 9 5 Description Not applicable. 6 Derivation of the functional model 6.1 Functional model description The functional model for the MSN supplementary service is shown in figure 1. ÚÄÄÄ ³FE2³ ÀÄÄÄÙ ÚÄÄÄ ³FE1³ ÀÄÄÄÙ Figure Description of the functional entities The functional entities required by the MSN supplementary service above those of the basic call are the follows: FE1: FE2: Served user's service agent MSN service control entity 6.3 Relationship with a basic service The relationship with a basic service is shown in figure 2. NOTE: The basic call model is defined in CCITT Recommendation Q.71 [5], subclause 2.1, with the exception that r1 represents an outgoing call relationship from a CCA and r3 represents an incoming call relationship to a CCA. Originating Service: ÚÄÄÄ ÚÄÄÄ ³FE1³ ³FE2³ ÚÁÄÄÂÙ r1 ÚÁÄÄÂÙ r2 ÚÄÄÄ r2 ÚÄÄÄ r3 ÚÄÄÄ ³CCAÃÄÄÄÄÄÄÄÄ CC ÃÄÄÄÄÄÄÄÄ CC ÃÄÄÄÄÄÄÄÄ CC ÃÄÄÄÄÄÄÄÄÄ CCA³ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ Terminating Service: ÚÄÄÄ ÚÄÄÄ ³FE2³ ³FE1³ ÚÄÄÄ r1 ÚÄÄÄ r2 ÚÄÄÄ r2 ÚÁÄÄÂÙ r3 ÚÁÄÄÂÙ ³CCAÃÄÄÄÄÄÄÄÄ CC ÃÄÄÄÄÄÄÄÄ CC ÃÄÄÄÄÄÄÄÄ CC ÃÄÄÄÄÄÄÄÄÄ CCA³ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ Figure 2

10 Page 10 7 Information flows 7.1 Information flow diagrams The information flows for the MSN supplementary service are shown in figures 3 and 4. ÚÄÄÄÄÄ ÚÄÄÄÄÄ ³ FE1 ³ ³ FE2 ³ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ 211 ³ ³211 SETUP 221³ ³ >>>>³912³>>>>³ >³>>>>>³923³221 ³ ³ req.ind ³924³>>>> Figure 3: MSN supplementary service operations on an outgoing call ÚÄÄÄÄÄ ÚÄÄÄÄÄ ³ FE2 ³ ³ FE1 ³ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ 241 >>>>³921³241 SETUP 251³ ³251 ³922³>>>>³ >³>>>>³911³>>>> ³ ³ req.ind ³ ³ Figure 4: MSN supplementary service operations on an incoming call 7.2 Definition of individual information flows There are no information flows specific to this service. NOTE: The contents for SETUP in basic call are as specified for basic call (see CCITT Recommendation Q.71 [5]).

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12 Page 12 Note to figure 5. NOTE: MSN6 and MSN7 break the basic call transition during FEA 211 (see figure 2-8 (Sheet 1 of 11) of CCITT Recommendation Q.71 [5]) between "Process Service Request Connect" and SETUP. MSN7 reconnects at the same point.

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14 Page 14 Note to figure 6. NOTE: MSN3, MSN4 and MSN5 break the basic call transition during FEA 251 (see figure 2-8 (Sheet 7 of 11) of CCITT Recommendation Q.71 [5]), immediately following the "Y" branch of the decision "Compatible". MSN4 reconnects at the same point, and MSN5 joins the "N" branch of the decision "Compatible".

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16 Page 16 Notes to figure 7. NOTE 1: MSN1 and MSN2 break the basic call transition: during FEA 241 (see figure 2-9 (Sheet 7 of 19) of CCITT Recommendation Q.71 [5]), by following the "Y" branch of the decision "Supplementary Service Provided?" on the "Y" branch of the task "Term Screen Process Attempt" decision "Successful" and rejoins at the "N" branch of the decision "supplementary service provided". NOTE 2: MSN8 and MSN9 break the basic call transition: during FEA 241A (see figure 2-9 (Sheet 13 of 19) of CCITT Recommendation Q.71 [5]), subsequent to the decision "Successful" but prior to the sending of SETUP req.ind.

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18 Page 18 Notes to figure 8. NOTE 1: MSN10 and MSN11 break the basic call transition during FEA 221 (see figure 2-9 (Sheet 1 of 19) of CCITT Recommendation Q.71 [5]), immediately following the "Y" branch of the task "Orig. Screen Process Attempt" decision "Successful". MSN11 reconnects at the same point. NOTE 2: MSN12 and MSN13 break the basic call transition during FEA 221 (see figure 2-9 (Sheet 1 of 19) of CCITT Recommendation Q.71 [5]), by following the "Y" branch of the decision "Supplementary Service Provided?" on the "N" branch of the task "Orig. Screen Process Attempt" decision "Successful". MSN13 reconnects at the same point. 9 Functional Entity Actions (FEAs) The FEAs of FE1 shall be optional for the basic call but shall be mandatory for the MSN supplementary service. 9.1 FEAs of FE1 For an incoming call: 911: The functional entity shall analyse the multiple subscriber number digits in the call set-up information and compare them with the configured multiple subscriber digits for use in the basic call. For an outgoing call: 912: The functional entity shall insert the multiple subscriber number digits in the call set-up information as the calling party number. 9.2 FEAs of FE2 For an incoming call: 921: The functional entity shall derive the multiple subscriber number digits from the ISDN number. 922: The functional entity shall insert the multiple subscriber number digits into the call set-up information for transmission over the interface. For an outgoing call: 923: The functional entity shall obtain and screen the digits from the call set-up information. 924: The functional entity shall derive the ISDN number from the multiple subscriber number digits.

19 10 Allocation of functional entities to physical locations The possible locations of functional entities FE1 and FE2 are shown in table 1. Table 1 ÚÄÄÄÄÄÂÄÄÄÄÄ ³ FE2 ³ FE1 ³ ÚÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÅÄÄÄÄÄ ³Scenario 1³ LE ³ TE ³ ÀÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÁÄÄÄÄÄÙ Page 19 NOTE: FE2 and FE1 are always allocated at opposite ends of the same access.

20 Page 20 History Document history October 1991 May 1996 First Edition Converted into Adobe Acrobat Portable Document Format (PDF)